The rescue where I got my grey from told me the lady gave him up because he started to bite her and loved her husband. Her husband did not really care for him as he was the wife's bird, so she gave him to the rescue because she thought he hated her. They had bought him as a baby and he was two when they gave him up. Now he loves me, well most of the time:) depending on what mood he is in. He will try and regurgitate for me sometimes, but he is not much of a lover and the only time he likes his head scratched is at night. He also likes my husband most of the time too, sometimes he prefers to be with him than me, so I would also say it is a phase.